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BO Pegasi: A candidate on the breaking stage of the TRO cycle
Qian SB(钱声帮)1,2,3; Qian, SB (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
Source PublicationASTRONOMY & ASTROPHYSICS
2002-06
Volume387Issue:3Pages:903-906
DOI10.1051/0004-6361:20020167
Contribution Rank第1完成单位
Indexed BySCI ; EI
KeywordStars : Binaries : Close Stars : Individuals : Bo Peg Stars : Evolution
AbstractA detailed period study of the short-period (P = 0.(d)58) close binary system, BO Peg, is presented based on the analysis of its O-C curve. It is found that the orbital period shows a continuous decrease with a rate dP/dt = -1.26 x 10(-7) days/year while it undergoes a possible small-amplitude oscillation. If the period oscillation is cyclic, it can be explained either by the light-time effect via the presence of an unseen third body or by the magnetic activity cycle of the secondary component. The continuous period decrease suggests a secular mass transfer from the more massive to the less massive component, which is in agreement with the near-contact configuration with a lobe-filling primary (Yamasaki & Okazaki 1986). These observations, as seen in RT Scl, FT Lup, TT Her, RS Ind, and V388 Cyg, are consistent with the Thermal Relaxation Oscillation (TRO) theory in that the primary component is transferring mass to the secondary in the broken-contact phase. To satisfy such a decrease in the orbital period, a conservative mass transfer rate (with no magnetic effect) would be of the order of dM/dt = 1.53 x 10(-7) M./year.
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-6361
URL查看原文
Archive Date2002-06-26
WOS IDWOS:000175901300012
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordORBITAL PERIOD MODULATION ; URSAE MAJORIS SYSTEMS ; CLOSE BINARIES ; CONTACT
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Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5758
Collection双星与变星研究组
Corresponding AuthorQian, SB (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
Affiliation1.Yunnan Observatory, Chinese Academy of Sciences, PO Box 110, 650011 Kunming, PR China
2.National Astronomical Observatories, Chinese Academy of Science (NAOCAS)
3.United Laboratory of Optical Astronomy, Chinese Academy of Science (ULOAC)
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Qian SB,Qian, SB . BO Pegasi: A candidate on the breaking stage of the TRO cycle[J]. ASTRONOMY & ASTROPHYSICS,2002,387(3):903-906.
APA Qian SB,&Qian, SB .(2002).BO Pegasi: A candidate on the breaking stage of the TRO cycle.ASTRONOMY & ASTROPHYSICS,387(3),903-906.
MLA Qian SB,et al."BO Pegasi: A candidate on the breaking stage of the TRO cycle".ASTRONOMY & ASTROPHYSICS 387.3(2002):903-906.
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